#include<iostream>
#include<unistd.h>

using namespace std;
extern char** environ;
int main()
{
    for(int i = 0; environ[i]; i++)
    {
        cout << environ[i] << endl;
    }
    cout << "hello Linux, I am a C++ pragma" << getpid() << endl;
    cout << "hello Linux, I am a C++ pragma" << getpid() << endl;
    cout << "hello Linux, I am a C++ pragma" << getpid() << endl;
    cout << "hello Linux, I am a C++ pragma" << getpid() << endl;
    return 0;
}
